We went through this on our 1993 Caliber 40 a year ago. We ended up rebuilding the entire fridge box (painful project) and installing an air-cooled SeaFrost 12V compressor. Very happy with the results now that it's done. The SeaFrost unit has worked great for us with a low amp draw. In the Pacific Northwest we're using maybe 20 amp/hours a day on refrigeration.